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Added wmbusmeters (#38533)

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@ -65,6 +65,7 @@ Maybe you like to build one yourself?
- [watermeter](https://github.com/nohn/watermeter) running classic OCR and statistical pattern recognition on any system supporting Docker
- [Muino water meter reader 3-phase](https://muino.nl/product/3-phase-muino-light-sensor-encoder/) Using the 3-phase sensor technique, a battery-powered version can be possible with this sensor.
- [Read water meter with magnetometer](https://github.com/tronikos/esphome-magnetometer-water-gas-meter) using [QMC5883L](https://esphome.io/components/sensor/qmc5883l.html) or [HMC5883L](https://esphome.io/components/sensor/hmc5883l.html), common and inexpensive magnetometers. This should be compatible with all the water meters the Flume water sensor is compatible with, which is [compatible](https://help.flumewater.com/en/articles/1618594-is-the-flume-device-compatible-with-all-water-meters) with about 95% of water meters in the United States.
- Some watermeters use [Wireless M-Bus](https://en.wikipedia.org/wiki/Meter-Bus) for remote metering. [wmbusmeters project](https://github.com/wmbusmeters/wmbusmeters/) can automatically capture, decode, decrypt and convert M-Bus packets to MQTT. It supports several M-Bus receivers, including RTL-SDR using [rtl-wmbus library](https://github.com/xaelsouth/rtl-wmbus). You can also build a WMBus [ESPHome-based receiver](https://github.com/SzczepanLeon/esphome-components). An [add-on](https://github.com/wmbusmeters/wmbusmeters-ha-addon) for Home Assistant exists for easy installation and configuration. See the [community page](https://community.home-assistant.io/t/add-on-request-wmbusmeter/228988) for more.
If you manually integrate your sensors, for example, using the [MQTT](/integrations/mqtt) or [RESTful](/integrations/rest) integrations: Make sure you set and provide the `device_class`, `state_class`, and `unit_of_measurement` for those sensors.